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UNITED STATE-SI PATENT OFFICE- HOMER U. SEAMAN. OF WASHINGTON, PENNSYLVANIA.

ENGRAVER S VI S E OR BLOCK.

srnozncnirron forming part of Letters Patent No. 420,968, datedFebruary 11,1890.

Application filed April 3, 1889. Serial No. 305,880. (No model.)

To all whom it may concern-,-

Be it known that I, HOMER U. SEAMAN, a citizen of the United States, residing at Wash ington, in the county of \Vashington and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Engravers Vises or Blocks, of which improvements the following is a specification.

The invention described herein relates to certain improvements in engravers vises or v blocks, and has for its object a construction whereby horizontal and partly in section and the vise or block embodying my invention.

of the work-holding part may be easily made.

In the accompanying drawings, forming a part of this specification, Figure 1 is a view, partly in elevation, of

Fig. .2 is a plan view, the upper portion of the work-holder being removed. Fig. 3 is a view "partly in 'sectionand'partly in elevation, the

section being taken on the line no m, Fig. 1; and Fig. '4. is a top plan view of the block.

In-the practice of my invention I provide an annular base 1, having a threaded recess therein for the reception of the lower end of the socket 2, the outer wall of that part of the socket fitting within the recess in the base being outwardly inclined, as shown in Fig. 1.

The socket 2 is held in position within the a series of anti-friction balls 9, whichsupbase by a ring 3, having its inner face inclined and constructed to engageand bear upon the inclined face of the socket 2, and its outer edge threaded, so as toengage the threaded outer'wall of the recess in the base 1. Within-the socket 2-is placed a ball 4, provided with a stem 5, projecting through a slot Yin said socket. The ball is held in position vertically by a' block 7, screwing into the lower end of the socket, as shown in Fig..

1. In the upper end of the block is formed a recess for the reception of a'portion of the ball 4, and around the edges of the said re-. cess is formed a groove 8 for the reception of port the ball 4 in positionand permit of the free rotation of the same eitherhorizontally or vertically. A groove 10, extending partially around the inner wall of the socket 2- that is, from one side-of the slot 6 around to the opposite side of said slot-is formed at or vertical adjustments near the upper end of the socket for the reception of anti-friction balls 11, against whlclr the ball 4.'bears,'as shown.

It will be readily understood that the ball 4, mounted, as above described, in the socket 2, can be rotated horizontally .or vertically, the stem 5, during the'latter movement, moving in the slot 6 in the socket. In addition to the horizontal rotation of the ball, the socket 2 may be' rotated horizontally by loosening the ring 3, provided with holes for the inserwalls of the slot 6, and of a plate 13, extending across the slot and adapted to be drawn firmly against the outer wall of the socket by a screw 14., passing through the plate 13 ,and screwing into the block 12, which is also by the same movement of the screw wedged up into the slot, as seenin Fig. 3. The plate 13 is provided on that edge adjacent to the stem,

5 with a circular notch, in which the stem rests, as shown in Fig. 2.

When it is desired to holdthe work-holder in a horizontal position, as shown in Fig. 1, the clamp, hereinbefore described, is moved up into the position shown in Figs. 1 and 2;

but should'it be desired to shift the workholder into an angular position the screw is turnedbaek and the clamp slipped down into the desired position in the slot 6, whereupon vertically until the stem comes into engagement with the plate13. v

The stem 5 is provided with a pin 15, as shown in Fig. 1, said pin fitting into a hole in the stem 16 of the work-holding'block 17.

In the face of this block is formed a groove .havingj'undercut walls extending entirely across the face of the block, and in said groove are mounted the dovetailed blocks-18 and 19,

the ball 4,with its work-holder, maybe turned said blocks being moved away from and toward each other by a right-and-left-hand screw 20, said screw being held from longitudinal movement by a fork 21, engaging a groove midway of said screw, as shown. This screw is rotated by a handle 22, hinged to one end of the screw and adapted when not in use to turn down onto a flattened portion on the work-block 17.

I claim herein as my invention- 1. In anengravers vise or block, the combination of a base having a recess therein, a socket adj ustably mounted in said base, a ball adjustably mounted in the socket, and a work-' holder carried by the ball, substantially as set forth.

' 2. In an engravers vise or block, the combination of a base having a recess therein, the vertical walls of said recess being threaded, a socket having the outer wall at its lower end inclined, and an externally-threaded ring screwing into the recess in the base and having an inclined inner wall, a ball fitting in jeeting throu 'ing the ball and stem'in any desired pOBltlOll,

ball fitting in said socket, and a work-holder carried by the ball,substant1all as set forth. 4. In an engravers vise or b ock, the combination of a vertically-slotted socket, a ball a mounted in the socket,and having a stem pro- 'h the slot, a' clamp for supporta series of r anti-friction balls arranged in said groove, a

and a work-holder carried by the ball,sub-

stantially as set forth. I

In testimony whereof I have hereunto set my hand.

HQME R U. SEAMAN.

Witnesses:

DARWIN S. Woncorr, R. H. Wm-rrnssnv. 

